Which testing type tests the complete, integrated system against the requirements?

Which testing type tests the complete, integrated system against the requirements?

• A. Unit testing
• B. Integration testing
• C. System testing
• D. Acceptance testing

Answer: (C)

Testing the complete, integrated system against the requirements is system testing. This phase checks the application as a whole to verify it behaves according to the specified functional and non-functional requirements, using end-to-end scenarios that reflect real usage. It ensures that all modules and components work together correctly in an environment similar to production, covering how data flows across the system, how features interact, and how the system performs under typical conditions. By contrast, unit testing looks at individual components in isolation, and integration testing focuses on the interactions between those components. Acceptance testing, usually performed by end users or customers, determines whether the system meets business needs and is ready for release.

Testing the complete, integrated system against the requirements is system testing. This phase checks the application as a whole to verify it behaves according to the specified functional and non-functional requirements, using end-to-end scenarios that reflect real usage. It ensures that all modules and components work together correctly in an environment similar to production, covering how data flows across the system, how features interact, and how the system performs under typical conditions. By contrast, unit testing looks at individual components in isolation, and integration testing focuses on the interactions between those components. Acceptance testing, usually performed by end users or customers, determines whether the system meets business needs and is ready for release.